/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package monitor

import (
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
)

func TestMockFileWatcherStart(t *testing.T) {
	stopCh := make(chan struct{})
	eventChan := make(chan string)

	watcher := &MockFileWatcher{
		EventChan: eventChan,
		Callbacks: make(map[string]FileChangedCallback),
		StopCh:    stopCh,
	}

	callbackCalled := false
	watcher.RegisterCallback("test_event", func(filename string, opType OpType) {
		assert.Equal(t, "test_event", filename)
		assert.Equal(t, Write, opType)
		callbackCalled = true
	})

	go watcher.Start()

	watcher.EventChan <- "test_event"

	assert.Eventually(t, func() bool { return callbackCalled }, 1*time.Second, 10*time.Millisecond,
		"Callback function should be called")

	close(stopCh)
}
